WO2016001448A1 - Respiratory device - Google Patents

Respiratory device

Info

Publication number
WO2016001448A1
WO2016001448A1 PCT/EP2015/065364 EP2015065364W WO2016001448A1 WO 2016001448 A1 WO2016001448 A1 WO 2016001448A1 EP 2015065364 W EP2015065364 W EP 2015065364W WO 2016001448 A1 WO2016001448 A1 WO 2016001448A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
air
oxygen
compressed
ventilation
pressure
Prior art date
Application number
PCT/EP2015/065364
Other languages
German (de)
French (fr)
Inventor
Eugen Kagan
Original Assignee
Ms Westfalia Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • A61M16/208Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A61M16/209Relief valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057Pumps therefor
    • A61M16/0066Blowers or centrifugal pumps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0057Pumps therefor
    • A61M16/0066Blowers or centrifugal pumps
    • A61M16/0069Blowers or centrifugal pumps the speed thereof being controlled by respiratory parameters, e.g. by inhalation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022Control means therefor
    • A61M16/024Control means therefor including calculation means, e.g. using a processor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0883Circuit type
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours
    • A61M16/12Preparation of respiratory gases or vapours by mixing different gases
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours
    • A61M16/12Preparation of respiratory gases or vapours by mixing different gases
    • A61M16/122Preparation of respiratory gases or vapours by mixing different gases with dilution
    • A61M16/125Diluting primary gas with ambient air
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10Preparation of respiratory gases or vapours
    • A61M16/12Preparation of respiratory gases or vapours by mixing different gases
    • A61M16/122Preparation of respiratory gases or vapours by mixing different gases with dilution
    • A61M16/125Diluting primary gas with ambient air
    • A61M16/127Diluting primary gas with ambient air by Venturi effect, i.e. entrainment mixers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • A61M16/201Controlled valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • A61M16/208Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M2039/0009Assemblies therefor designed for particular applications, e.g. contrast or saline injection, suction or irrigation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00Special media to be introduced, removed or treated
    • A61M2202/02Gases
    • A61M2202/0208Oxygen
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • A61M2205/3331Pressure; Flow
    • A61M2205/3334Measuring or controlling the flow rate
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • A61M2205/3331Pressure; Flow
    • A61M2205/3337Controlling, regulating pressure or flow by means of a valve by-passing a pump
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • A61M2205/3365Rotational speed
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • A61M2205/3368Temperature

Abstract

Disclosed is a respiratory device (1) for supplying breathing air to a patient, comprising an oxygen inlet (2) to be connected to an oxygen supply, and a compressed air inlet (3) to be connected to a compressed air supply; the respiratory device (1) additionally comprises a turbine (9) for sucking in ambient air; switching between the individual operating modes can be done automatically or manually.

Description

breathing device

State of the art

The invention relates to a breathing device according to the preamble of claim 1.

Conventional ventilation devices are used to supply a suitable mixture of oxygen and air to a patient, for example, to ventilate the patient completely artificial and / or to support his breathing at least partially. However, it is conventional ventilation devices always a compressed air supply is required and must be made via an air pressure cylinder or a stationary compressed air supply system, for example in a hospital, are available. Therefore, in the conventional ventilation devices is a mobile use, that is, so that the capabilities of conventional ventilation devices are also restricted to the stationary in this sense, operating without air pressure bottle or air supply system, not possible. In mobile use, there is oxygen or turbine-powered devices.

It is therefore the object of the present invention to provide a breathing apparatus that does not have the disadvantages of the prior art and in particular to operate in stationary and mobile applications made possible without the patient having to be switched from one to the other device , Disclosure of the Invention

This object is achieved with the inventive ventilation apparatus according to claim. 1

Characterized in that the ventilation device in addition to compressed air, and oxygen comprising the turbine for drawing in ambient air, in addition to the conventional steady-state operation with compressed air, a mobile operation using the existing ambient air always possible. Thus, the respirator covers all uses.

The respiratory device may be designed to completely take over the patient's breathing; but it can also be provided to support the patient's breathing in part and in particular to allow an independent breathing of the patient. The oxygen from the oxygen supply is in the ventilation device, either pure or mixed with the air out in a suitable manner, so that the patient with adequate respiratory air can be supplied. To this end the ventilation device to an output or an output terminal for the respiratory air, in which the patient or a tube system of the patient can be connected. The mixing of the oxygen-enriched air may be compressed air from the compressed air supply or from the ambient air sucked turbine. The respirator can be used as a standalone alone unit, but can also in combination with other medical devices, particularly in a modular use, are used. The oxygen supply may be an oxygen tank and / or a stationary oxygen supply or a stationary oxygen line system, for example in a hospital. The oxygen in the oxygen supply may be provided, for example, under a pressure of 2.8 bar to 6.0 bar and 280 kPa to 600 kPa. The compressed air supply may be a compressed air cylinder and / or a stationary compressed air supply and a stationary compressed air line system. The compressed air may be present, for example, under a pressure of 2.8 bar to 6.0 bar and 280 kPa to 600 kPa. With turbine in the context of this application any suction is meant with the ambient air can be sucked in. It can be provided, for example, the turbine produces a vacuum of about 150 mbar and 15 kPa.

The oxygen flow or flows from the oxygen supply through the oxygen input through an oxygen line into the ventilation device. The ventilation device may comprise a pressure sensor which measures the pressure of the oxygen in the oxygen line.

According to one embodiment of the invention, the ventilation device, both in the oxygen line, for example at the entrance of the oxygen line, and in the compressed air line, for example at the input of the compressed air line, in each case a pressure sensor. This has the advantage that both lines can be monitored so that a failure or unplugging of compressed air and / or oxygen can be immediately compensated by the connection of the turbine. It is thus compensated not only failed compressed air through the turbine, but if necessary, a failed oxygen supply. This is particularly advantageous in alternating mode, as the manual switching of the patient between the mobile and stationary unit can take for example up to 15 minutes. If, for example, in a mobile application in which no compressed air is available, an oxygen pressure bottle to be replaced, so is the time available until new oxygen is available, automatically bridged by the connection of the turbine and the ventilation of the patient therefore continued. A connected air supply can also be used as backup in case the turbine fails. In the event that there is no compressed air supply by means of compressed air and turbine is possible, ventilated with oxygen.

The ventilation device may comprise a metering valve, with which the oxygen in the oxygen line can be dosed and the flow rate of oxygen can be regulated by the oxygen line. Furthermore, the ventilation device may comprise a flow sensor that measures the flow of oxygen through the oxygen duct. It can be provided, in addition to running for loading the breathing device on the oxygen line and the turbine to supply additional ambient air.

If a compressed air supply is connected, the compressed air flows through the compressed air inlet by a compressed air line in the breathing device. The respiratory device may have a further pressure sensor, which measures the pressure of the compressed air in the compressed air line. The ventilation device may comprise a further metering valve, the metered compressed air in the compressed air line or the flow of compressed air can be controlled by the compressed air line. In addition to the compressed air oxygen via the oxygen can be supplied to line simultaneously.

Advantageous embodiments and further developments of the invention are in the dependent claims, and the description with reference to the drawings removed. In the respiratory device of oxygen, compressed air and / or ambient air sucked in are mixed together. This can be done in the piping system of the respirator.

According to an exemplary refinement, it is provided that the ventilation device comprises a mixing chamber being mixed in the mixing chamber as the oxygen from the oxygen supply of the compressed air from the compressed air supply or the aspirated ambient air. In particular whereby the structure of the ventilation device can be significantly simplified can when aspirating the ambient air to the turbine, the flow of the air are controlled directly by the turbine can be advantageously dispensed with so that a pressure accumulator.

It can in particular be provided that the flow rate of the aspirated ambient air over the speed of the turbine is controlled. Depending on the need for flow rate of the aspirated ambient air the speed of the turbine can be advantageously changed, with less need for the rotational speed of the turbine can be reduced so that when demand is high, the rotational speed of the turbine increases and. It may be provided in particular that the pressure, the flow pattern and / or the volume of air sucked through the turbine is adjustable. In particular, these parameters can be set via the rotational speed of the turbine allows the structure of the ventilation device is substantially simplified. In one embodiment it is provided that the ventilation device comprises an oxygen input for connection to an oxygen supply, can pass oxygen through an oxygen line in the direction of a mixing chamber through the oxygen inlet and a compressed air inlet for connection to a compressed air supply, said compressed air a through the compressed air inlet by can flow compressed air line in the direction of the mixing chamber. The ventilation device in addition being sucked ambient air can flow through an ambient air duct from a suction port in the direction of the mixing chamber has the turbine for sucking ambient air. The compressed air line and / or the ambient air conduit may combine with oxygen to form a common air line, if oxygen is present. Otherwise it was ventilated with air. If a mixing chamber is present, the lines can be connected upstream of the mixing chamber or open separately into the mixing chamber. The ventilation device comprises a metering valve for metering the oxygen supplied through the oxygen inlet. The metering valve and the turbine are connected via a control circuit with a first pressure and / or flow meter for measuring the oxygen pressure and / or -durchflusses by the oxygen line and a second pressure and / or flow meter for measuring the air pressure and / or -durchflusses by air line, wherein the metering valve and the turbine in dependence on the measured oxygen pressure and / or -flow and the measured air flow can be controlled. Since pressure sensors are provided both on the oxygen input and at the compressed air inlet by means of which the voltage present at oxygen inlet and / or compressed air supply pressure is monitored, the metering valve and the turbine in dependence on the measured oxygen pressure and the measured air pressure can be controlled.

This has the advantage that the control of the breathing device via the respective flow rates or the individual line pressures takes place and no accumulator is needed. This is particularly advantageous for a mobile usability of the breathing device as a pressure accumulator is technically complicated and also has a relatively large amount of space.

It can further be provided that the settings of the flow rate, pressure, the flow pattern and / or the volume of sucked air can be controlled by a microprocessor, it being the settings manually set by the user or automatically selected by a selected mode of ventilation. The microprocessor allows a precise control of the above parameters. In addition, the flexibility is substantially increased when using the respirator.

In particular, the ventilation device can automatically switch between stationary and mobile operation. Between the three operating modes compressed air turbine, and oxygen or an order of priority can be automatically set, but it can also be switched manually. For this purpose, pressure sensors are provided associated with the oxygen inlet and the compressed air input to monitor the applied input pressure for oxygen and / or compressed air. If there is a pressure drop, such as applied pressure bottles are empty or supply lines are disconnected in order to lay, for example a patient, the turbine is turned on in response to the recorded pressure drop automatically by the controller in order to obtain the respiration maintained. Of course, this control can shut off and the turbine can be turned on manually. Accordingly, the ventilation device includes means to determine if compressed air and / or oxygen are connected and have sufficient pressure. In a control unit of the ventilator program code is stored, which causes the automatic selection of the operating mode, wherein the choice may be used, for example, the fact whether compressed air and / or oxygen are connected operational, the need for respiratory air, a manual input by an operator. For example, it may be determined that the ventilation with compressed air and oxygen has first priority, however, to resort to a ventilation with ambient air sucked in and oxygen as a second priority, if no compressed air is connected. If no oxygen is connected, can only be done with compressed air or with a third priority ventilation exclusively with drawn ambient air when no compressed air is connected. As a second priority, a ventilator

This automatic selection can be canceled by an operator, by carrying out a manual input. For example, they can select that a ventilator is exclusively with oxygen, although compressed air is available or the turbine is operational.

The automatic selection with the possibility of lifting them manually or change, has the advantage that the breathing device provides in any situation appropriate breathing air without switching takes time. Thus it is particularly suitable for mobile use and to switch between different uses.

It may further be provided, for example, that the gas mixture of air and oxygen is passed through an output line to the output of the respiratory assembly. It may be provided, for example further characterized in that the ventilation device comprises a further flow sensor that measures the flow of breathing air in the output line. In addition, the ventilation device may comprise a temperature sensor and / or a pressure sensor with which the temperature and / or pressure of the breathing air in the outlet line can be measured. This makes it advantageously possible to check constantly whether the mixed breathing air is suitable for the patient. It is as described above provided that the ventilation device ((turbine optional (with oxygen), compressed air, optionally with oxygen) and oxygen) is selectively in one of three operating modes operable, wherein the operating modes of a user can be selected, wherein in the first mode sucks in the ambient air turbine and compressed air is supplied to compressed air supplied from the compressed air supply in the second mode, and the turbine is switched off. Thereby, it is advantageously possible that the user of the breathing device selects the first or the third mode depending on the intended use when a mobile use of the ventilation device is desired, and is available, for example, compressed air supply. In this first mode, the metering valve in the compressed air line is closed so that no air can flow through the compressed air line. The total air supply is ensured in the first mode over the turbine, so that the ventilation apparatus can be operated independently and autonomously of stationary compressed air supply or compressed air bottles. Thus, the applications of the breathing device are considerably extended. The addition of oxygen, for example from a pressure bottle is possible in both modes as required. Alternatively, the ventilation apparatus can be operated in the second mode, for example, when a stationary compressed air supply is available. In the second mode, the turbine is switched off, so that advantageously, the energy supply to the turbine can be spared if a stationary compressed air supply is available. The operation of the breathing device in these two modes, and the variable selectability one of the two operating modes depending on the use by the user allows for a flexible use of the possibility of ventilation apparatus and increases the range of use of the ventilation device in a high degree. However, it is also possible to use compressed air and turbine parallel, if deemed necessary. This is implemented on the control side by the compressed air input, the oxygen input and the turbine are individually and independently switchable from each other and also combined in appropriate combinations as operating programs can be switched available.

The respiratory device may also be used in the third mode, in which it is connected only to the oxygen supply. It is not connected compressed air to the compressed air inlet. In addition, the turbine is switched off.

If the pressure sensor, a pressure drop is detected, the turbine can be automatically switched to obtain eg when disconnecting the compressed air to transport the patient's respiration maintained.

According to another exemplary embodiment of a metering valve for metering the oxygen supplied through the oxygen inlet and the turbine via a control circuit with a first flow meter for measuring the oxygen flow and a second flow meter for measuring the air flow rate are connected, wherein the proportioning valve and the turbine in response to the measured oxygen flow and the measured air flow can be controlled. The control is effected such that the flows are measured and the metering valve and / or the turbine can be controlled in dependence on these values ​​in order to generate the desired pressure, the volume, the flow pattern and / or the oxygen concentration in the breathing air for the patient. The control circuit advantageously allows continuous monitoring of the flow rates and continuous adjustment of the turbine or of the metering valve in order to always obtain a suitable composition of the breathing air and more particularly to an appropriate oxygen concentration.

As already mentioned, the control can alternatively be on the pressure gauge instead of the flowmeter. According to another exemplary embodiment, the respiratory device to a non-return valve which permits a flow of air from the turbine in the direction of the mixing chamber and prevents an air flow from the mixing chamber toward the turbine. This can advantageously be achieved that the patient spontaneous breathing during Geräteexpirationsphase can be made possible. In addition, when operating in the second mode, an outflow of the compressed air can be prevented through the turbine. According to another exemplary embodiment it is provided that the ventilation device comprises a Notentlüftungseinrichtung that can at overpressure in the breathing device the excess pressure, for example from the output line drain. Thereby, it is advantageously possible to prevent the occurrence of dangerous for the patient pressures, which may arise in the use of oxygen under pressure and / or compressed air. can escape Notentlüftungseinrichtung may for example comprise a valve disposed in the output line pressure relief valve, which is opened by a control valve, so that excess pressure from the output line.

According to another exemplary embodiment, the respiratory device to a thus configured venturi nozzle, that the Venturi nozzle is flowed through by the oxygen from the oxygen input either via the high pressure line (oxygen bottle or oxygen central hospital care) or the low pressure line (oxygen concentrator), thereby generating such a negative pressure, is sucked ambient air and supplied to the mixing with the oxygen. It may in particular be provided, for example, that the ventilation device in addition, that is to say as a complement to the first and second mode, is in a third mode operated, said off the turbine in the third mode and the compressed air supply is closed, so that the air supply exclusively via the is from the venturi intake ambient air. The venturi can be found in the oxygen line if a mixing chamber is present, for example, before the mixing chamber. In this third operating mode can be advantageous to dispense with a compressed air supply and there is no operation of the turbine required. This third mode is therefore suitable for mobile applications without stationary compressed air supply and does not require any energy for the turbine. thus the third mode of operation enables a flexible and mobile applications using relatively little energy and expands the possible uses of the respiratory apparatus considerably. The supply of oxygen through the venturi can be controlled by a further metering valve and also the supply of the intake air can be controlled by a further metering valve. Among other things, the pressure ratios determined in the venturi, the amount of intake air and thereby the oxygen concentration in the mixing chamber.

Embodiments of the present invention are illustrated in the drawings and explained in detail in the following description.

Brief description of the drawings schematically

1 shows a ventilation apparatus according to an exemplary

Embodiment of the present invention,

2 shows a breathing device in accordance with another exemplary

Embodiment of the present invention, and

3 shows a breathing device in accordance with another exemplary

Embodiment of the present invention. Embodiments of the invention

In the various figures, identical parts are always provided with the same reference numerals and will therefore only once usually named or mentioned.

Figure 1 schematically shows a ventilation apparatus 1 according to an exemplary embodiment of the present invention. The ventilation apparatus 1 comprises an oxygen inlet. 2 Oxygen is supplied to the oxygen inlet 2 at a pressure of for example 2.8 to 6.0 bar or connected 280-600 kPa. It can also be a low pressure supply of oxygen may be provided (from the oxygen concentrator). Between these alternative oxygen supply lines can be switched manually or automatically. This oxygen supply may be provided for example by an oxygen bottle or a central oxygen supply or oxygen-low-pressure line from the oxygen concentrator. The oxygen flows into the oxygen line 20 of the oxygen inlet 2 in the direction of a mixing chamber 13 into which the oxygen line 20 opens. The ventilation apparatus 1 comprises downstream of the oxygen inlet 2 in the oxygen line 20 a pressure sensor 5 which measures the inlet pressure of the oxygen. The ventilation apparatus 1 comprises in the oxygen line 20 to a metering valve 7, with which the oxygen can be metered. The ventilation apparatus 1 comprises in the oxygen line 20 to a flow sensor 11 which measures the flow of oxygen through the oxygen duct 20th

The ventilation apparatus 1 has a suction port 3, which is provided with a filter and serving for drawing in ambient air. The ambient air flows through an ambient air conduit 22 from the suction port 3 in the direction of the mixing chamber 13. The ambient air is sucked through a turbine. 9 The turbine 9 produces a vacuum of about 150 mbar and 15 kPa. seen in the flow direction of the ambient air 9, a check valve 10 is disposed downstream of the turbine. The non-return valve 10 only opens for air flow from the turbine 9 in the direction of the mixing chamber 13, that is, the check valve 10 is closed for a flow from the mixing chamber 13 in direction of the turbine 9 and does not allow flow in this direction. The ventilation apparatus 1 comprises a compressed air inlet 4, to the compressed air, for example with a pressure of 2.8 to 6.0 bar and 280 to 600 kPa is connected. This compressed air supply can be provided for example by a compressed air cylinder or a central compressed air supply. The compressed air flows through a compressed air line 21 from the compressed air inlet 4 towards the mixing chamber 13. The ventilation apparatus 1 comprises downstream of the compressed air inlet 4 in the compressed air line 21 a pressure sensor 6 which measures the input pressure of the compressed air. The ventilation apparatus 1 comprises in the compressed air line 21 to a metering valve 8, with which the supply of the compressed air can be metered.

The compressed air line 21 connects to the ambient air conduit 22 to a common air conduit 27. The ventilation apparatus 1 comprises a temperature sensor 18 which measures the temperature of the air in the air duct 27th The ventilation apparatus 1 includes a flow sensor 12 which measures the flow of air in the air conduit 27th The oxygen conduit 20 and the air pipe 27 open into the mixing chamber. 13

The gas mixture leaves the mixing chamber 13 through an output line 23 leading from the mixing chamber 13 to the patient or to the connector for the patient tubing system. The ventilation apparatus 1 comprises a control valve 14 and a pressure relief valve 15th The control valve 14 serves to control the pressure relief valve 15. The ventilation apparatus 1 comprises a temperature sensor 19 which measures the temperature of the gas mixture in the outlet line 23, the mixing chamber has left. 13 The ventilation apparatus 1 includes a flow sensor 16 which measures the flow rate of the gas mixture in the output line 23rd The ventilation apparatus 1 comprises a pressure sensor 17 which measures the pressure of the gas mixture at the patient connection port. The ventilation device 1 can be operated in a first mode in which the ventilation device 1 is connected to the oxygen input 2 to the oxygen supply and ambient air through the turbine 9 is sucked to the suction opening. 3 In this mode, the metering valve 8 is closed so that the compressed air line is closed 21st With the metering valve 7 and the turbine 9, the pressure to be applied directly to the patient, the flow pattern, the volume and the oxygen concentration is administered, for example by means of a not shown microprocessor. These parameters can either be set manually by the user or automatically determined by the selected mode of ventilation.

In order to be able to apply the flow pattern and the oxygen concentration is correct, the metering valve 7 and the turbine 9 constitute a multi-stage control loop together with the flow sensors 11 and 12. FIG. The oxygen concentration is determined by an oxygen content measuring cell / sensor and / or the ratio of measured pressures and flow rates of the flow sensors 11 and 12. FIG. The total flow is determined by the sum of the measured pressures and flow rates of the flow sensors 11 and 12. FIG. In order to apply the correct pressure gradient, the metering valve 7 and the turbine 9 constitute a further control circuit together with the pressure sensor 17th The mixing chamber 13 is intended only to better mixing of oxygen and air, and in particular represents no pressure accumulator. The present in the mixing chamber or gas supplied to the patient is therefore not controlled to a constant predetermined pressure. The control is effected, rather than the pressure sensors 5 and 6 and / or via the flow sensors 11 and 12. As the turbine is designed 9 on the dynamic operation to and can thus produce the required flow and pressure directly, no accumulator is needed. In a second mode of ventilation apparatus 1, the air ambient air instead from the group consisting of a compressed air cylinder or a central air supply is provided which is connected to the compressed air inlet. 4 In this mode, the turbine is off 9, so that no air can flow through the ambient air duct 22nd In addition, the metering valve 8 is opened so that compressed air can flow via the air line 27 into the mixing chamber 13 through the compressed air line 21st The one-way valve or check valve 10 prevents the pressure across the turbine 9 is reduced inadvertently. In addition, the check valve 10 allows the patient to breathe at any time during the expiratory pause of the respiratory assembly. The rest of the sequence corresponds to the sequence in the operation mode is switched turbine 9. The microprocessor must the various inlet pressures while in the control circuits taken into account in its control.

It is further connected to the ventilation device 1, a possible emergency venting in order to prevent the occurrence of dangerous for the patient pressures, which may arise in the use of oxygen under pressure and / or compressed air. For emergency venting the pressure relief valve 15 is opened via the control valve 14 so that excess pressure from the output line 23 can escape.

Figure 2 schematically shows a ventilation apparatus 1 according to another exemplary embodiment of the present invention. This embodiment largely corresponds to the embodiment of the figure 1, wherein the ventilation device 1 in this embodiment, in addition two metering valves 25, 26 and having a venturi nozzle 24. The remaining components correspond to the components of the artificial respiration device 1 in the figure 1, can be so that reference is made for its description in the description of FIG. 1

In comparison to the ventilation apparatus according to the embodiment of Figure 1 27 and the mixing chamber 13 is arranged, the metering valve 26 in this exemplary embodiment, between the flow sensor 12 in the air line. Moreover, in the oxygen line 20 between the flow sensor 11 and the mixing chamber 13, the metering valve 25 and the venturi 24 are disposed. The venturi nozzle 24 is also connected via a further air line 28 to the air line 27th In this exemplary embodiment, the ventilation device 1 can be used in a third mode in which the ventilation device is only connected to the oxygen supply at the oxygen input 2. 1 It is connected to compressed air at the compressed air inlet 4 and the metering valve 8 is closed. In addition, the turbine 9 is off. In this mode, the metering valve 25 is switched such that the oxygen is passed through the oxygen line 20 through the venturi 24th Thereby, a negative pressure is created in the venturi nozzle 24, whereby ambient air through the air line 28, the air conduit 27, ambient air line 22, the switched turbine 9 and the suction port 3 is sucked, since the check valve 10, an air flow from the suction port 3 in the direction of the mixing chamber 13 permits. This ambient air sucked in passes through the air conduit 27 into the mixing chamber 13 and is mixed with the oxygen from the oxygen line twentieth The pressure conditions in the venturi nozzle 24 determine the amount of sucked air and the oxygen concentration in the mixing chamber 13. The oxygen concentration can be controlled for example via the metering valve 26th Incidentally, reference may be made to the section on character first If on one of the pressure sensors 5, 6, a pressure drop are detected, the turbine can be turned on automatically 9 to maintain for example, when disconnecting the compressed air to transport a patient's respiration.

Figure 3 schematically shows a ventilation apparatus 1 according to a third embodiment of the invention. This embodiment differs from that shown in Figure 1 in that no mixing chamber is provided.

Instead, the air conduit 27 and the oxygen conduit 20 open into a common output line 23 leading to the patient or to the connector for the patient tubing system. The mixture of gases in this embodiment is in the output line 23. This has the advantage that the

Space required by the ventilation device 1 is particularly low, so that it is particularly suitable for mobile use. For good order's sake it is noted that the above-described embodiments only serve to illustrate the present invention and not intended to limit the subject matter of the invention in any way.

LIST OF REFERENCE NUMBERS

1 respirator

2 oxygen input

3 intake

4 Compressed air inlet

5, 6, 17 pressure sensor

7, 8 metering valve

9 turbine

10 check valve

11, 12, 16, flow sensor

13 mixing chamber

14 control valve

15 pressure relief valve

18, 19 temperature sensor

20 oxygen line

21 compressed air line

22 ambient air duct

23 output line

24 venturi

25, metering valve 26

27, 28 air pipe

Claims

claims
1. Ventilation device (1) for supplying a patient with respiratory air, comprising an oxygen input (2) for connection to an oxygen supply and an air inlet (3) for connection to a compressed air supply, wherein the ventilation device (1) further comprises a turbine (9) for sucking having from ambient air, said pressure sensors (5, 6) the oxygen input (2) and the compressed air inlet (3) are provided associated, by means of which the oxygen at the input (2) and / or
Compressed air inlet (3) pressure applied is monitored and at a
Pressure drop at the oxygen input (2) and / or the compressed air inlet (3), the turbine (9) is switched on automatically.
2. Ventilation apparatus (1) according to claim 1, characterized
in that the ventilation device (1) comprises a mixing chamber (13), wherein in the mixing chamber (13) of the oxygen from the
Oxygen supply with that of the turbine (9) the aspirated ambient air is mixed.
3. Ventilation apparatus (1) according to claim 1, characterized
in that the oxygen from the oxygen supply with that of the turbine (9) sucked ambient air or with compressed air from a compressed air supply in an output line (23) of the ventilation device (1) is mixed.
4. Ventilation device (1) according to any one of the preceding
Claims, characterized in that the flow rate and / or the pressure of the aspirated ambient air over the speed of the turbine (9) is regulated.
5. Ventilation device (1) according to any one of the preceding
Claims, characterized in that the ventilation device (1) is operable in a first mode or a second mode, wherein in the first mode sucks the turbine (9) of ambient air and no
Compressed air is supplied to compressed air supplied from the compressed air supply in the second mode and the turbine (9) is switched off.
6. Ventilation device (1) according to claim 5, characterized
in that
The ventilation device (1) is also operable in a third mode wherein off the turbine (9) in the third mode and the compressed air supply is closed.
7. Ventilation device (1) according to claim 5 or 6, characterized in that the operating mode is automatically selected according to a predetermined priority, wherein the automatic selection is canceled by manual selection by an operator.
8. Ventilation apparatus (1) according to any one of claims 5 to 7, characterized in that in the first and second mode additional oxygen through the oxygen inlet (2) can be fed.
9. Ventilation apparatus (1) according to any one of the preceding
Claims, characterized in that the settings of the pressure, the flow pattern and / or the volume of the turbine (9) sucked air can be controlled by a microprocessor, wherein the settings made manually by a user or by a selected
Ventilation mode can be automatically set.
10. Ventilation apparatus (1) according to any one of the preceding
Claims, characterized in that the ventilation device (1) a metering valve (7) for metering the oxygen supplied via the
includes oxygen inlet (2), wherein the metering valve (7) and the turbine (9) via a control circuit with a first flow meter (11) for measuring the oxygen flow and a second flow meter (12) are connected for measuring the air flow, the metering valve ( 7) and the turbine (9) in dependence on the measured oxygen flow and / or the measured air flow can be controlled.
11. Ventilation apparatus (1) according to one of claims 1 to 9, characterized in that the ventilation device (1) (7) has a metering valve for metering the oxygen supplied through the oxygen inlet (2), wherein the metering valve (7) and the turbine (9) are connected via a control circuit with a first pressure sensor (5) for measuring the oxygen pressure and a second pressure sensor (6) for measuring the air pressure, wherein the metering valve (7) and the turbine (9) in dependence on the measured oxygen pressure and / or can be controlled to the measured air pressure.
12. Ventilation apparatus (1) according to any one of the preceding
Claims, characterized in that the ventilation device (1) comprises a check valve (10), the air flow from the turbine (9) in the direction of the patient and a spontaneous breathing during the
Exhalation allows and prevents an air flow in direction of the turbine (9).
13. Ventilation apparatus (1) according to any one of the preceding
Claims, characterized in that the ventilation device (1) has a Notentlüftungseinrichtung (14, 15) is configured such that, when pressure in the breathing apparatus (1) the excess pressure
can be drained.
14. Ventilation apparatus (1) according to any one of the preceding
Claims, characterized in that the ventilation device (1) has such a configured venturi nozzle (24) so ​​that the Venturi nozzle (24) is flowed through by the oxygen from the oxygen inlet (2), thereby generating such a negative pressure that ambient air is sucked in and for mixing is supplied with the oxygen.
15. Ventilation apparatus (1) according to claim 14, characterized
in that in the third mode, an air supply solely via the of the venturi nozzle (24) ambient air sucked takes place.
PCT/EP2015/065364 2014-07-04 2015-07-06 Respiratory device WO2016001448A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102014109394.1 2014-07-04
DE201410109394 DE102014109394A1 (en) 2014-07-04 2014-07-04 breathing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20150734664 EP3164183B1 (en) 2014-07-04 2015-07-06 Respiratory device
CN 201580036676 CN106470725A (en) 2014-07-04 2015-07-06 Respiratory device

Publications (1)

Publication Number Publication Date
WO2016001448A1 true true WO2016001448A1 (en) 2016-01-07

Family

ID=53524780

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/065364 WO2016001448A1 (en) 2014-07-04 2015-07-06 Respiratory device

Country Status (4)

Country Link
EP (1) EP3164183B1 (en)
CN (1) CN106470725A (en)
DE (1) DE102014109394A1 (en)
WO (1) WO2016001448A1 (en)

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EP1205203A2 (en) * 1994-10-14 2002-05-15 Bird Products Corporation Exhalation flow transducer
US20030150456A1 (en) * 2002-02-13 2003-08-14 Norbert Wruck Gas mixer with a plurality of ejectors for a medical respirator
US20090241960A1 (en) * 2008-04-01 2009-10-01 Event Medical, Inc. Dual high and low pressure breathing system
US8047205B2 (en) * 2006-11-25 2011-11-01 Dräger Medical GmbH Gas-mixing device for respirators
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US5664563A (en) * 1994-12-09 1997-09-09 Cardiopulmonary Corporation Pneumatic system
EP2411078B1 (en) * 2009-03-23 2016-05-18 Koninklijke Philips N.V. Gas mixing control apparatus
EP2425869A1 (en) * 2010-09-07 2012-03-07 Imt Ag Ventilator device and/or anaesthetic device
CN103189088B (en) * 2010-10-26 2016-12-07 皇家飞利浦电子股份有限公司 Pressure line for the mechanical ventilator system was purged
DE102012024672A1 (en) * 2012-12-18 2014-06-18 Dräger Medical GmbH Ventilator and method for operating a respirator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1205203A2 (en) * 1994-10-14 2002-05-15 Bird Products Corporation Exhalation flow transducer
EP1064043A1 (en) * 1998-01-15 2001-01-03 Nellcor Puritan Bennett Incorporated Oxygen blending in a piston ventilator
US20030150456A1 (en) * 2002-02-13 2003-08-14 Norbert Wruck Gas mixer with a plurality of ejectors for a medical respirator
US8047205B2 (en) * 2006-11-25 2011-11-01 Dräger Medical GmbH Gas-mixing device for respirators
US20090241960A1 (en) * 2008-04-01 2009-10-01 Event Medical, Inc. Dual high and low pressure breathing system
US20130276789A1 (en) * 2010-12-21 2013-10-24 Koninklijke Philips Electronics N.V. Ventilator with integrated blower to provide negative or positive pressure in a ventilator system

Also Published As

Publication number Publication date Type
DE102014109394A1 (en) 2016-01-07 application
EP3164183A1 (en) 2017-05-10 application
CN106470725A (en) 2017-03-01 application
EP3164183B1 (en) 2018-05-09 grant

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